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VPN FAQs

These are some of the most commonly asked questions about using the Cisco VPN client in the SCS environment. Additional information about using the VPN software and troubleshooting problems can be found in the installation information for your platform and the Cisco VPN client documentation (off-site link, will open in a new browser window).

On this page: General FAQs

  1. I can't get the client because I have no network access. What do I do?
  2. Can I use VPN to gain access to SCS services from a non-SCS host with a 128.2.*.* IP address?
  3. Will VPN work with my wireless home network?
  4. What split tunneling?
  5. Can I configure what goes down the VPN tunnel?
  6. I want to have multiple VPN tunnels going at once on multiple machines, behind a Linksys box. Will that work?
  7. Since my OS has built-in support for VPN, why do I need to install special VPN software?

General VPN FAQs

  1. I can't get the client because I have no network access. What do I do?

    VPN is not a method for accessing the Internet. To get on the Internet, you must contact an Internet service provider. The VPN runs over your DSL, cable, or other broadband connection. Get the connection first, then download the client.

    If you have not done this and want to install the VPN client anyway, contact us and we may be able to make you a CD copy of the installer and install instructions. You will need to come to the SCS Help Desk to pick it up.

  2. Can I use VPN to gain access to SCS services from a non-SCS host with a 128.2.*.* IP address?

    No. Our VPN setup is not intended to be used for that purpose, and there are some networking issues that make it problematic to do so.

  3. Will VPN work with my wireless home network?

    Yes, but in some cases you may need to enable the "VPN passthrough" option on your home router.

  4. What is split tunneling?

    The client uses either split tunneling or full tunneling to forward your packets. With split tunneling, only packets destined for CMU network addresses go through the tunnel; all other data uses your local internet connection. With full tunneling, all packets are sent through the tunnel. The type of tunnel that is built at connection time is designated by the tunnel address entered in the client software. View the installation instructions specific to your OS for details.

  5. Can I configure what goes down the VPN tunnel?

    No. The VPN profile is pushed out by the server and is not configurable in the client software.

  6. I want to have multiple VPN tunnels going at once on multiple machines, behind a Linksys box. Will that work?

    We have done this successfully with a Linksys BEFVP41 and a Linksys BEFV11S4.

  7. Since my OS has built-in support for VPN, why do I need to install special VPN software?

    There are a few reasons why we are using the Cisco AnyConnect VPN client:
    • The Cisco AnyConnect VPN client uses IPSec (Internet Protocol Security) via digital certificates to establish the VPN tunnel, and does user authentication via RADIUS (Remote Authentication Dial-In User Service) and Kerberos, using your /remote Kerberos principal.
    • Consistency: Using the Cisco VPN software provides a consistent means of configuring legacy clients, rather than having different software for each platform. We needed one VPN solution that we could deliver to all supported Windows operating systems, MacOS, and Linux.
    • Support: Using a single client allows us to provide better support and troubleshooting for problems, and makes it easier to test and integrate this software into our environment.
  8.